An independent, non-partisan public opinion research organization that studies attitudes toward politics, the press and public policy issues.

An independent, nonpartisan resource on trends in American public opinion.

Sponsored by the Council on Foreign Relations, this site is a comprehensive digest of existing polling data on U.S. and global public attitudes on the world's most pressing challenges.

Archives of social science data, specializing in data from surveys of public opinion. The data goes back to the 1930s. Mostly United States data, but over 50 nations are represented.

The association promotes the right to conduct and publish scientific research on what the people and its groups think in every country in the world, and encourages international cooperation and exchange.